I suspect the engine would be buzzing at 60 mph hiway speed? I never drove one but my old 1970 Austin Mini at 60 mph would be noisy with engine noise. My old 1958 Triumph TR3A had an overdrive and it made a big difference. Having said that for a local town car it would be a blast! I am pretty sure there was no overdrive on an old Sprite.
I like the rollbar in that Sprite. It can also act as a headache rack.
